Locking device for internal-combustion engines



J. L. WELLER AND F. E. WINCHESTER.

LOCKING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR-7.19M.

1 29,943 Patented Feb. 3, 1920.

W ammo UNITED STATES PATENT OFFICE.

- JOHN L. WELLER AND FRANKLIN EARL WINCHESTER, 0F RICHMOND, INDIANA.

LOCKING- DEVICE FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Feb. .3, 1920.

Applicationfiled April 7, 1917. Serial No. 160,426.

To allwhom it may concern:

Be it known that we, JOHN L. WELLER and FRANKLIN EARL WINCHESTER, citizens of the United States, residing at Richmond, in the county of Wayne and State of Indiana, have invented certain new: and useful Improvements in Locking Devices for Internal-Combustion Engines, of which the following is a specification.

This invention relates to improvements in locking devices for internal combustion engines, it more particularly relating to devices especiailly, adapted for locking the motor of an automobile although not necessarily limited to that particular purpose.

The object of the invention is to provide a lock for the fuel supply which is incorporated as a self-contained or unitary part of the carbureter so that the lockin feature may be installed by the builder of t e car or a by the maker of a carbureter in a manner to obviate the necessity of altering the construction of the motor or its manifold or otherwise disturbin the arrangement and relative positions 0 the manifold and carbureter.

A further object of the invention is to provide a locking device of the character referred to which will be simple in construction andeffective in operation.

In the accompanying drawings Figure 1 is a side elevation ofa carburetor partly broken awayand shown in section with a portion of the manifold in section showi our im ro'ved locking device applied t ereto, t e parts being shown in locked position.

Fig. 2 is a detailed section of a portion of the locking devices.

Fig. 3 is a view of the key.

Fig. 4 is a section showing the parts in the unlocked position.

Referring to the drawings, 1 represents the cas' of a carbureter which may be of any well nown type, the upper portion of the casing being rovided with the usual fuel outlet control ed by the usual butterfly valve 6, which is capable of being rotated from the position shown in Fig. 1 only in a clockwise direction. In the present case, the wall of the carbureter adjacent the outlet is provided with an enlargement 1, bored out to form a chamber 1 within which is located a cylindrical casing 2 containing any suitable form of operating devices for the purpose of retracting and ejecting a pin 3,

which device will be controlled by a key 8.

This pin 3, when the parts are in the locking position shown in Fig. 1, enters a recess 4 in the wall of the enlarged portion 1 and thereby locks the cylindrical casing 2.

The casing 2 has integrally formed therewith a locking bolt 2 which projects through an opening in the wall of the carbureter casing which leads into the outlet passage thereof just beneath the butterfly valve, 6, when in its closed position. A

coiled spring 5 interposed between the V inner end of the casing 2 and the inner wall of the chamber 1 which normally tends to throw the casing 1 and locking bolt 2 to unlocking position. The casing 2 is provided with a slot or recess 2 and a set screw 7 threaded into the wall of the enlarged portion at projects into this recess 'so as to limit the movement of the casing 2 in either direction.

In operation, assuming the butterfly valve to be looked as shown in Fig. 1, the operator by insertingthe key 8 is enabled to withdraw'the pin 3 from the recess 4, whereupon the sprin'g'fi throws the casing 2 and its locking bolt 2 outwardly to unlocking position, this outward movement bein llmited by the set-screw 7 in the slot 2. en it is desired to lock the butterfly valve 6, the easing 2 is pushed inwardly until the pin 3 registers with the recess I, which Will be the case when the inward movement of the casing 2 is stopped by, the set screw 7, whereupon the pin 3 throwninto the recess 4 and the parts thereby locked. including the valve 6. In the'present case the pin 3 is thrown to locking position b a spring (not shown), although, if desir the ke may be employed to not onlywithdraw t e pin the fixed parts, as would be the case w ere a valve and lock is attempted to'be inserted in the manifold between the carbureter proper and the engine. This construction is also particularly applicable to the later types of automobiles in which the manifold is practicall eliminated, thereby precludin the possibility of successfully installing a Iockable valve therein. The construction also is of value in that it enables the maker economically and efiectively than where such locking device is installed as an accessory in the manifold or between the carbureter-and the manifold. The construction 7 is also such that the locking devices, when in unlocked position, will form no obstruction in the manifold or carbureter.

There has been shown in the drawing but a small portion of the'manifold pipe, indicated by the reference character 9, to which the carbureter is attached.

Having thus described our invention, we claim: I

1. In a device of the character described, a carbureter and its casing, a valve permanently secured within said casing an ins ertible locking member for said valve slidably mounted within the casing of the car bureter comprising solely a slidi locking bolt and a casing member yielding y mountwith a spring for holding same in unlocked position and a locking pin, said locking bolt being arranged transversely within the casing of the carbureter whereby the looking bolt will contact with the side of said permanently secured valve for the purpose specified.

In testimony whereof, we have hereuntoset our hands this 31st day of March, 1917 JOHN L. WELLER.

FRANKLIN EARL .WINGHEQTBR. WVitnesses:

WILL W. Rnmm,

MARTHA CONNOR. 

